And we get to hear a moving live recording of one of their collaborative pieces.

The most moving collaborative piece, though, is by Mr. Johns.

In all, a collaborative piece that works on all levels.

His contributions in collaborative pieces were primarily to add in jokes.

At the end of Bay Avenue, two collaborative pieces use nature as an interactive element.

During this time, both of the brothers were producing art, mostly experiments and sketches that would inform later collaborative pieces.

Meanwhile, for the show's one three-person collaborative piece, he brings his energies into fine focus.

Gilmour has stated that he considers the song the most collaborative piece ever produced by the group.

In 2002, the music groups toured in Spain, performing a number of collaborative pieces.

A number of other collaborative pieces were written and subsequently recorded by the two choirs, although to date the recording has not been released.